5XOC

Crystal structure of human Smad3-FoxH1 complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.196 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Hydrophobic patches on SMAD2 and SMAD3 determine selective binding to cofactors

Miyazono, K.I.Moriwaki, S.Ito, T.Kurisaki, A.Asashima, M.Tanokura, M.

(2018) Sci Signal 11: --

  • DOI: 10.1126/scisignal.aao7227
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The transforming growth factor-β (TGF-β) superfamily of cytokines regulates various biological processes, including cell proliferation, immune responses, autophagy, and senescence. Dysregulation of TGF-β signaling causes various diseases, such as can ...

    The transforming growth factor-β (TGF-β) superfamily of cytokines regulates various biological processes, including cell proliferation, immune responses, autophagy, and senescence. Dysregulation of TGF-β signaling causes various diseases, such as cancer and fibrosis. SMAD2 and SMAD3 are core transcription factors involved in TGF-β signaling, and they form heterotrimeric complexes with SMAD4 (SMAD2-SMAD2-SMAD4, SMAD3-SMAD3-SMAD4, and SMAD2-SMAD3-SMAD4) in response to TGF-β signaling. These heterotrimeric complexes interact with cofactors to control the expression of TGF-β-dependent genes. SMAD2 and SMAD3 may promote or repress target genes depending on whether they form complexes with other transcription factors, coactivators, or corepressors; therefore, the selection of specific cofactors is critical for the appropriate activity of these transcription factors. To reveal the structural basis by which SMAD2 and SMAD3 select cofactors, we determined the crystal structures of SMAD3 in complex with the transcription factor FOXH1 and SMAD2 in complex with the transcriptional corepressor SKI. The structures of the complexes show that the MAD homology 2 (MH2) domains of SMAD2 and SMAD3 have multiple hydrophobic patches on their surfaces. The cofactors tether to various subsets of these patches to interact with SMAD2 and SMAD3 in a cooperative or competitive manner to control the output of TGF-β signaling.


    Organizational Affiliation

    Laboratory of Basic Science on Healthy Longevity, Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan.,Graduate School of Biological Sciences, Nara Institute of Science and Technology, Nara 630-0192, Japan.,Laboratory of Basic Science on Healthy Longevity, Department of Applied Biological Chemistry, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan. amtanok@mail.ecc.u-tokyo.ac.jp.,Biotechnology Research Institute for Drug Discovery, National Institute of Advanced Industrial Science and Technology, Ibaraki 305-8560, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Mothers against decapentaplegic homolog 3
A
199Homo sapiensMutation(s): 0 
Gene Names: SMAD3 (MADH3)
Find proteins for P84022 (Homo sapiens)
Go to Gene View: SMAD3
Go to UniProtKB:  P84022
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Thioredoxin 1,Forkhead box protein H1
B
141Escherichia coli (strain K12)Homo sapiens
This entity is chimeric
Mutation(s): 0 
Gene Names: trxA (fipA, tsnC), FOXH1 (FAST1, FAST2)
Find proteins for P0AA25 (Escherichia coli (strain K12))
Go to UniProtKB:  P0AA25
Find proteins for O75593 (Homo sapiens)
Go to Gene View: FOXH1
Go to UniProtKB:  O75593
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.4 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.196 
  • Space Group: P 63 2 2
Unit Cell:
Length (Å)Angle (°)
a = 131.865α = 90.00
b = 131.865β = 90.00
c = 91.602γ = 120.00
Software Package:
Software NamePurpose
PHENIXrefinement
SCALAdata scaling
MOLREPphasing
PDB_EXTRACTdata extraction
XDSdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
JSPS KAKENHIJapan15K14708
JSPS KAKENHIJapan23228003

Revision History 

  • Version 1.0: 2018-03-28
    Type: Initial release
  • Version 1.1: 2018-04-11
    Type: Data collection, Database references